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07-SEPTEMBER-2008 03:17:44 - Vertebrate trachea Vertebrate trachea Conducting passages. Laryngoscopic view of interior of larynx. Trachea labeled at bottom. Gray's subject #237 1084 Artery tracheal branches of inferior thyroid artery MeSH Trachea The traceartes, or windpipe, is a tube that has an inner diameter of about 20-25 mm and a length of about 10-16 cm in humans. It commences at the larynxat the level vertebral level of C6 in humans and bifurcates into the primary main bronchi at the vertebral level of T4/T5 in humans in mammals, and from the pharynx to the syrinx in birds, allowing the passage of air to the lungs. It is lined with pseudostratified ciliated columnar epithelium cells with mucosae goblet cells which produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles which the cilia then waft upwards towards their larynx and then the pharynx where it can then be swallowed into the stomach. In humans there are about 15 - 20 incomplete C-shaped cartilaginous rings which reinforces the anterior and lateral sides of the trachea to protect and maintain the airway open. There is a piece of smooth muscle connecting the ends off the incomplete cartilaginous rings called the Trachealis muscle. This contracts reducing the size of the lumen of the trachea to increase the air flow rate during coughing. The esophagus lies posteriorly to the trachea. The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus. The epiglottis is the flap that closes the trachea during swallowing to prevent swallowed matter from entering the trachea. Clinical significance Endotracheal intubation is the medical procedure of inserting an artificial tube into the trachea to provide a secure route for ventilating the lungs. Tracheotomy is a surgical procedure of making an opening in the front of the neck that extends to the lumen of the trachea, a short tube called a tracheostomy tube is inserted through this opening, entering below the level of the larynx and vocal cords. Tracheal diseases and conditions The following are diseases and conditions that affect the trachea: Choking Tracheomalacia weakening of the tracheal cartilage Tracheal collapse in dogs Tracheobronchial injury perforation of the trachea or bronchi Mounier-Kuhn syndrome causes abnormal enlargement of the trachea Additional images Section of the neck at about the level of the sixth cervical vertebra. Front view of heart and lungs. The tracheobronchial lymph glands. Ligaments of the larynx. Posterior view. Coronal section of larynx and upper part of trachea. Muscles of larynx. Posterior view. Muscles of larynx. Side view. Right lamina of thyroid cartilage removed. Transverse section of trachea. Sagittal section of nose mouth, pharynx, and larynx. The position and relation of the esophagus in the cervical region and in the posterior mediastinum. Seen from behind. Thyroid Respiratory system Microscopic cross section of human trachea. v d e Anatomy: respiratory system Upper respiratory tract Nose Nasal cavity Pharynx Larynx Lower respiratory tract Trachea Lungs Bronchi, Alveoli, Conducting zone, Respiratory zone v d e Anatomy of torso, respiratory system: Lungs and related structures lungs right left lingula apex base root cardiac notch cardiac impression hilum borders anterior, posterior, inferior surfaces costal, mediastinal, diaphragmatic fissures oblique, horizontal conducting zone trachea tracheal rings, carina bronchi main bronchus right, left lobar/secondary bronchi eparterial bronchus segmental/tertiary bronchi bronchopulmonary segment bronchiole terminal bronchiole respiratory zone respiratory bronchiole alveolar duct alveolus alveolar-capillary barrier pleurae parietal pleura cervical, costal, mediastinal, diaphragmatic visceral pleura pulmonary ligament recesses costomediastinal, costodiaphragmatic pleural cavity Retrieved from http://en..org/wiki/Vertebrate_trachea Categories: Respiratory therapy | Respiratory system | Thorax Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages العربية Aymar Bosanski БългарÑ?ки Català Česky Deutsch Eesti Español Esperanto Euskara Français Hrvatski Bahasa Indonesia Italiano עברית Latina Lietuvių МакедонÑ?ки Nederlands 日本語 ‪Norsk bokmÃ¥l‬ Polski Português РуÑ?Ñ?кий Sicilianu SlovenÅ¡Ä?ina СрпÑ?ки / Srpski Srpskohrvatski / СрпÑ?кохрватÑ?ки Suomi Svenska Türkçe УкраїнÑ?ька ייִדיש ä¸æ–‡ This page was last modified on 23 August 2008, at 17:25
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